Morning!

 

When my Z is cold the engine judders unless you rev it a bit higher to 2500 revs and seems a bit hesitent when you put your foot down but as soon as it walmed up 5 mins into the jurney its fine.

 

I thought it may just need the intake manifolds cleaning out with carb cleaner as they are prob rather gunked up..................?

it does not misfire or have rough tickover, smooth as silk.

is this the correct way round to fit your fuel filter as mine is the opposute way round to this one, (flat side closest to the windscreen) this might be my issue!

http://www.zhome.com/ZCMnL/PICS/hesitation/fuelFilter981104-174123.jpg

is this the correct way round to fit your fuel filter as mine is the opposute way round to this one, (flat side closest to the windscreen) this might be my issue!

http://www.zhome.com/ZCMnL/PICS/hesitation/fuelFilter981104-174123.jpg

 

Thats the correct way round yes

Morning!

 

When my Z is cold the engine judders unless you rev it a bit higher to 2500 revs and seems a bit hesitent when you put your foot down but as soon as it walmed up 5 mins into the jurney its fine.

 

I thought it may just need the intake manifolds cleaning out with carb cleaner as they are prob rather gunked up..................?

 

it could the AIVC control, it may faulty. A good cleaning may save you couple of hundred £.

 

Having said that, it is not ideal putting your foot down on a car that is not warmed up yet, you are not wearing out your engine, if the car is a turbo, you're are ruinning your turbo as well

 

Goodluck

Iv cleaned the throttle bodydys out with wd40 and a tooth brush and that has helped a lot, not juddering much anymore which is good but its still a bit hesitent so iv got some slick 50 fuel system and injector cleaner stuff as its prob due a bit of a clean.